PRPG Core Rulebook pg. 317
Obscuring Mist
conjuration \ (Creation) \
Casting time: 1 standard action
Range: 20 ft
Duration: 1 min./level (D)
Effect: cloud spreads in 20-ft. radius from you, 20 ft. high
Description
A misty vapor arises around you. It is stationary. The vapor obscures all sight, including darkvision, beyond 5 feet. A creature 5 feet away has concealment (attacks have a 20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker cannot use sight to locate the target).
A moderate wind (11+ mph), such as from a gust of wind spell, disperses the fog in 4 rounds. A strong wind (21+ mph) disperses the fog in 1 round. A fireball, flame strike, or similar spell burns away the fog in the explosive or fiery spell's area. A wall of fire burns away the fog in the area into which it deals damage.
This spell does not function underwater.